cant help much as i have never played with a Powermac.
Could it be that you problem is just that you are enabling to many things ?
What i mean is, does it boot if you just enable plain vesa console and no frambuffer or drm support at all ?
I would also make sure that your card is supported by nouveau / kms.

Hopefully someone else with similar hardware can pop by and help you out.

With the 2nd kernel, try passing video=ofonly to the kernel. That will select the Open Firmware driver.

I haven't seen the lockups with nouveau, but that should work around them. Can you put your kernel log and config somewhere? It's possible that you've built something into the kernel that causing a problem, like a device trying to map x86 I/O addresses._________________Gentoo PPC FAQ: http://www.gentoo.org/doc/en/gentoo-ppc-faq.xml

With the 2nd kernel, try passing video=ofonly to the kernel. That will select the Open Firmware driver.

I haven't seen the lockups with nouveau, but that should work around them. Can you put your kernel log and config somewhere? It's possible that you've built something into the kernel that causing a problem, like a device trying to map x86 I/O addresses.

Thanks very much!

video=ofonly helps to prevent the stall-messages but doesn't boot either.

I couldn't reconstruct the exact config though.
But I did put one that doesn't produces stall-messages there:

I tried the debian-testing-powerpc-DVD-1.iso on 3th of January.
An older one with 3.x kernel worked for someone with an G5 quad late 2005 according to the following thread:
http://www.mintppc.org/forums/viewtopic.php?f=15&t=1052
There are a couple of differences like the quad has got a
GeForce 6600 instead of a GeForce 6600 LE.

From qemu-system-ppc64, even with fedora 19 which has kernel 3.9.5, it also seems hung at
Calling quiesce...
returning from prom_init

but if you put "-vnc :0" and connect VNC with it, you will see the penguin logo on the VNC window, and you can type things there, but don't know which one is waiting input there and what input it expects._________________Roger Freeman